Amongst its other duties, msm_gem_new_impl adds the newly created
GEM object to the shared inactive list which may also be actively
modifiying the list during submission.  All the paths to modify
the list are protected by the mutex except for the one through
msm_gem_import which can end up causing list corruption.
Signed-off-by: NJordan Crouse <jcrouse@codeaurora.org>
[add extra WARN_ON(!mutex_is_locked(&dev->struct_mutex))]
Signed-off-by: NRob Clark <robdclark@gmail.com>

Use the dma_fence_match_context helper to check if all backing fences
are from our own context, in which case we don't have to wait.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Gustavo Padovan <gustavo.padovan@collabora.com>
[rebased on code-motion]
Signed-off-by: NRob Clark <robdclark@gmail.com>

struct irq_domain_ops is not modified, so it can be made const.
Signed-off-by: NTobias Klauser <tklauser@distanz.ch>
Signed-off-by: NRob Clark <robdclark@gmail.com>

Otherwise, if userspace doesn't re-use a given plane, it's hwpipe(s)
could stay permanently assigned.
Signed-off-by: NRob Clark <robdclark@gmail.com>

If we follow the typical pattern of the base class being the first
member, we can use the default dma_fence_free function.
Signed-off-by: NEric Anholt <eric@anholt.net>
Cc: Rob Clark <robdclark@gmail.com>
Cc: linux-arm-msm@vger.kernel.org
Cc: freedreno@lists.freedesktop.org
Reviewed-by: NRob Clark <robdclark@gmail.com>
Signed-off-by: NRob Clark <robdclark@gmail.com>

Without this, polling on the dma-buf (and presumably other devices
synchronizing against our rendering) would return immediately, even
while the BO was busy.
Signed-off-by: NEric Anholt <eric@anholt.net>
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Cc: Rob Clark <robdclark@gmail.com>
Cc: linux-arm-msm@vger.kernel.org
Cc: freedreno@lists.freedesktop.org
Reviewed-by: NRob Clark <robdclark@gmail.com>
Signed-off-by: NRob Clark <robdclark@gmail.com>

Otherwise if someone was using old bindings with "core_clk" instead of
"core" as the clock name, we'd never find it and gpu would be stuck at
27MHz (or whatever it's slowest rate is).

Fixes: 98db803f ("msm/drm: gpu: Dynamically locate the clocks from the device tree")
Signed-off-by: NRob Clark <robdclark@gmail.com>

Somehow the helper was never retrofitted for mdp5.  Which meant when
plane_state->fence was added, it could get copied into new state in
mdp5_plane_duplicate_state().

If an update to disable the plane (for example on rmfb) managed to sneak
in after an nonblock update had swapped state, but before it was
committed, we'd get a splat:

    WARNING: CPU: 1 PID: 69 at ../drivers/gpu/drm/drm_atomic_helper.c:1061 drm_atomic_helper_wait_for_fences+0xe0/0xf8
   Modules linked in:

   CPU: 1 PID: 69 Comm: kworker/1:1 Tainted: G        W       4.11.0-rc8+ #1187
   Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT)
   Workqueue: events drm_mode_rmfb_work_fn
   task: ffffffc036560d00 task.stack: ffffffc036550000
   PC is at drm_atomic_helper_wait_for_fences+0xe0/0xf8
   LR is at complete_commit.isra.1+0x44/0x1c0
   pc : [<ffffff80084f6040>] lr : [<ffffff800854176c>] pstate: 20000145
   sp : ffffffc036553b60
   x29: ffffffc036553b60 x28: ffffffc0264e6a00
   x27: ffffffc035659000 x26: 0000000000000000
   x25: ffffffc0240e8000 x24: 0000000000000038
   x23: 0000000000000000 x22: ffffff800858f200
   x21: ffffffc0240e8000 x20: ffffffc02f56a800
   x19: 0000000000000000 x18: 0000000000000000
   x17: 0000000000000000 x16: 0000000000000000
   x15: 0000000000000000 x14: ffffffc00a192700
   x13: 0000000000000004 x12: 0000000000000000
   x11: ffffff80089a1690 x10: 00000000000008f0
   x9 : ffffffc036553b20 x8 : ffffffc036561650
   x7 : ffffffc03fe6cb40 x6 : 0000000000000000
   x5 : 0000000000000001 x4 : 0000000000000002
   x3 : ffffffc035659000 x2 : ffffffc0240e8c80
   x1 : 0000000000000000 x0 : ffffffc02adbe588

   ---[ end trace 13aeec77c3fb55e2 ]---
   Call trace:
   Exception stack(0xffffffc036553990 to 0xffffffc036553ac0)
   3980:                                   0000000000000000 0000008000000000
   39a0: ffffffc036553b60 ffffff80084f6040 0000000000004ff0 0000000000000038
   39c0: ffffffc0365539d0 ffffff800857e098 ffffffc036553a00 ffffff800857e1b0
   39e0: ffffffc036553a10 ffffff800857c554 ffffffc0365e8400 ffffffc0365e8400
   3a00: ffffffc036553a20 ffffff8008103358 000000000001aad7 ffffff800851b72c
   3a20: ffffffc036553a50 ffffff80080e9228 ffffffc02adbe588 0000000000000000
   3a40: ffffffc0240e8c80 ffffffc035659000 0000000000000002 0000000000000001
   3a60: 0000000000000000 ffffffc03fe6cb40 ffffffc036561650 ffffffc036553b20
   3a80: 00000000000008f0 ffffff80089a1690 0000000000000000 0000000000000004
   3aa0: ffffffc00a192700 0000000000000000 0000000000000000 0000000000000000
   [<ffffff80084f6040>] drm_atomic_helper_wait_for_fences+0xe0/0xf8
   [<ffffff800854176c>] complete_commit.isra.1+0x44/0x1c0
   [<ffffff8008541c64>] msm_atomic_commit+0x32c/0x350
   [<ffffff8008516230>] drm_atomic_commit+0x50/0x60
   [<ffffff8008517548>] drm_atomic_remove_fb+0x158/0x250
   [<ffffff80085186d0>] drm_framebuffer_remove+0x50/0x158
   [<ffffff8008518818>] drm_mode_rmfb_work_fn+0x40/0x58
   [<ffffff80080d5668>] process_one_work+0x1d0/0x378
   [<ffffff80080d5a54>] worker_thread+0x244/0x488
   [<ffffff80080db7fc>] kthread+0xfc/0x128
   [<ffffff8008082ec0>] ret_from_fork+0x10/0x50

Fixes: 96260142 ("drm/fence: add in-fences support")
Cc: stable@vger.kernel.org
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Reported-by: NStanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>

Otherwise, if nothing else enabled selects it, dev_pm_opp_of_add_table()
will return -ENOTSUPP.

Fixes: e2af8b6b ("drm/msm: gpu: Use OPP tables if we can")
Signed-off-by: NRob Clark <robdclark@gmail.com>

this bug happened when amdgpu load failed.

[   75.740951] BUG: unable to handle kernel paging request at 00000000000031c0
[   75.748167] IP: [<ffffffffa064a0e0>] amdgpu_fbdev_restore_mode+0x20/0x60 [amdgpu]
[   75.755774] PGD 0

[   75.759185] Oops: 0000 [#1] SMP
[   75.762408] Modules linked in: amdgpu(OE-) ttm(OE) drm_kms_helper(OE) drm(OE) i2c_algo_bit(E) fb_sys_fops(E) syscopyarea(E) sysfillrect(E) sysimgblt(E) rpcsec_gss_krb5(E) nfsv4(E) nfs(E) fscache(E) eeepc_wmi(E) asus_wmi(E) sparse_keymap(E) intel_rapl(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) snd_hda_intel(E) snd_hda_codec(E) snd_hda_core(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) snd_hwdep(E) snd_pcm(E) snd_seq_midi(E) coretemp(E) kvm_intel(E) snd_seq_midi_event(E) snd_rawmidi(E) kvm(E) snd_seq(E) joydev(E) snd_seq_device(E) snd_timer(E) irqbypass(E) crct10dif_pclmul(E) crc32_pclmul(E) mei_me(E) ghash_clmulni_intel(E) snd(E) aesni_intel(E) mei(E) soundcore(E) aes_x86_64(E) shpchp(E) serio_raw(E) lrw(E) acpi_pad(E) gf128mul(E) glue_helper(E) ablk_helper(E) mac_hid(E)
[   75.835574]  cryptd(E) parport_pc(E) ppdev(E) lp(E) nfsd(E) parport(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) autofs4(E) hid_generic(E) usbhid(E) mxm_wmi(E) psmouse(E) e1000e(E) ptp(E) pps_core(E) ahci(E) libahci(E) wmi(E) video(E) i2c_hid(E) hid(E)
[   75.858489] CPU: 5 PID: 1603 Comm: rmmod Tainted: G           OE   4.9.0-custom #2
[   75.866183] Hardware name: System manufacturer System Product Name/Z170-A, BIOS 0901 08/31/2015
[   75.875050] task: ffff88045d1bbb80 task.stack: ffffc90002de4000
[   75.881094] RIP: 0010:[<ffffffffa064a0e0>]  [<ffffffffa064a0e0>] amdgpu_fbdev_restore_mode+0x20/0x60 [amdgpu]
[   75.891238] RSP: 0018:ffffc90002de7d48  EFLAGS: 00010286
[   75.896648] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   75.903933] RDX: 0000000000000000 RSI: ffff88045d1bbb80 RDI: 0000000000000286
[   75.911183] RBP: ffffc90002de7d50 R08: 0000000000000502 R09: 0000000000000004
[   75.918449] R10: 0000000000000000 R11: 0000000000000001 R12: ffff880464bf0000
[   75.925675] R13: ffffffffa0853000 R14: 0000000000000000 R15: 0000564e44f88210
[   75.932980] FS:  00007f13d5400700(0000) GS:ffff880476540000(0000) knlGS:0000000000000000
[   75.941238] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.947088] CR2: 00000000000031c0 CR3: 000000045fd0b000 CR4: 00000000003406e0
[   75.954332] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.961566] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.968834] Stack:
[   75.970881]  ffff880464bf0000 ffffc90002de7d60 ffffffffa0636592 ffffc90002de7d80
[   75.978454]  ffffffffa059015f ffff880464bf0000 ffff880464bf0000 ffffc90002de7da8
[   75.986076]  ffffffffa0595216 ffff880464bf0000 ffff880460f4d000 ffffffffa0853000
[   75.993692] Call Trace:
[   75.996177]  [<ffffffffa0636592>] amdgpu_driver_lastclose_kms+0x12/0x20 [amdgpu]
[   76.003700]  [<ffffffffa059015f>] drm_lastclose+0x2f/0xd0 [drm]
[   76.009777]  [<ffffffffa0595216>] drm_dev_unregister+0x16/0xd0 [drm]
[   76.016255]  [<ffffffffa0595944>] drm_put_dev+0x34/0x70 [drm]
[   76.022139]  [<ffffffffa062f365>] amdgpu_pci_remove+0x15/0x20 [amdgpu]
[   76.028800]  [<ffffffff81416499>] pci_device_remove+0x39/0xc0
[   76.034661]  [<ffffffff81531caa>] __device_release_driver+0x9a/0x140
[   76.041121]  [<ffffffff81531e58>] driver_detach+0xb8/0xc0
[   76.046575]  [<ffffffff81530c95>] bus_remove_driver+0x55/0xd0
[   76.052401]  [<ffffffff815325fc>] driver_unregister+0x2c/0x50
[   76.058244]  [<ffffffff81416289>] pci_unregister_driver+0x29/0x90
[   76.064466]  [<ffffffffa0596c5e>] drm_pci_exit+0x9e/0xb0 [drm]
[   76.070507]  [<ffffffffa0796d71>] amdgpu_exit+0x1c/0x32 [amdgpu]
[   76.076609]  [<ffffffff81104810>] SyS_delete_module+0x1a0/0x200
[   76.082627]  [<ffffffff810e2b1a>] ? rcu_eqs_enter.isra.36+0x4a/0x50
[   76.089001]  [<ffffffff8100392e>] do_syscall_64+0x6e/0x180
[   76.094583]  [<ffffffff817e1d2f>] entry_SYSCALL64_slow_path+0x25/0x25
[   76.101114] Code: 94 c0 c3 31 c0 5d c3 0f 1f 40 00 0f 1f 44 00 00 55 31 c0 48 89 e5 53 48 89 fb 48 c7 c7 1d 21 84 a0 e8 ab 77 b3 e0 e8 fc 8b d7 e0 <48> 8b bb c0 31 00 00 48 85 ff 74 09 e8 ff eb fc ff 85 c0 75 03
[   76.121432] RIP  [<ffffffffa064a0e0>] amdgpu_fbdev_restore_mode+0x20/0x60 [amdgpu]
Signed-off-by: NRex Zhu <Rex.Zhu@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Smatch complains about a signedness bug here:

        vega10_hwmgr.c:4202 vega10_force_clock_level()
        warn: always true condition '(i >= 0) => (0-u32max >= 0)'

Fixes: 7b52db39 ("drm/amd/powerplay: fix bug sclk/mclk
                     level can't be set on vega10.")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NEric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

[  338.384770] BUG: unable to handle kernel NULL pointer dereference at           (null)
[  338.384817] IP: [<          (null)>]           (null)
[  338.385505] RIP: 0010:[<0000000000000000>]  [<          (null)>]           (null)
[  338.385950] Call Trace:
[  338.385993]  [<ffffffffa05d2313>] ? amdgpu_vm_flush+0x283/0x400 [amdgpu]
[  338.386025]  [<ffffffff811818d3>] ? printk+0x4d/0x4f
[  338.386074]  [<ffffffffa05d4906>] amdgpu_ib_schedule+0x4a6/0x4d0 [amdgpu]
[  338.386140]  [<ffffffffa0673e54>] amdgpu_job_run+0x64/0x180 [amdgpu]
[  338.386203]  [<ffffffffa0672e09>] amd_sched_main+0x2e9/0x4a0 [amdgpu]
[  338.386232]  [<ffffffff810bfce0>] ? prepare_to_wait_event+0x110/0x110
[  338.386295]  [<ffffffffa0672b20>] ? amd_sched_select_entity+0xe0/0xe0 [amdgpu]
[  338.386327]  [<ffffffff8109b423>] kthread+0xd3/0xf0
[  338.386349]  [<ffffffff8109b350>] ? kthread_park+0x60/0x60
[  338.386376]  [<ffffffff817e1ee5>] ret_from_fork+0x25/0x30
[  338.386401] Code:  Bad RIP value.
[  338.386420] RIP  [<          (null)>]           (null)
[  338.386443]  RSP <ffffc90001bd7d40>
[  338.386458] CR2: 0000000000000000
[  338.398508] ---[ end trace 4c66fcdc74b9a0a2 ]---
Signed-off-by: NChunming Zhou <David1.Zhou@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

We end up reading the interrupt register for HPD5, and then writing it
to HPD6 which on systems without anything using HPD5 results in
permanently disabling hotplug on one of the display outputs after the
first time we acknowledge a hotplug interrupt from the GPU.

This code is really bad. But for now, let's just fix this. I will
hopefully have a large patch series to refactor all of this soon.
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NLyude <lyude@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Even if the vblank period would allow it, it still seems to
be problematic on some cards.

bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868

Cc: stable@vger.kernel.org
Acked-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Check to make sure the vblank period is long enough to support
mclk switching.

v2: drop needless initial assignment (Nils)

bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868

Cc: stable@vger.kernel.org
Acked-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NRex Zhu <Rex.Zhu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Even if the vblank period would allow it, it still seems to
be problematic on some cards.

v2: fix logic inversion (Nils)

bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868

Cc: stable@vger.kernel.org
Acked-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Even if the vblank period would allow it, it still seems to
be problematic on some cards.

v2: fix logic inversion (Nils)

bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868

Cc: stable@vger.kernel.org
Acked-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Reinitializing the VM manager during suspend/resume is a very very bad
idea since all the VMs are still active and kicking.

This can lead to random VM faults after resume when new processes
become the same client ID assigned.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

With LVDS we were incorrectly picking the pre-programmed mode instead of
the prefered mode provided by VBT. Make sure we pick the VBT mode if
one is provided. It is likely that the mode read-out code is still wrong
but this patch fixes the immediate problem on most machines.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78562
Cc: <stable@vger.kernel.org>
Signed-off-by: NPatrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170418114332.12183-1-patrik.r.jakobsson@gmail.com

I failed to properly onion-wrap the unwind code: We acquire the vblank
reference before we start with the wait-wound locking dance, hence we
must make sure we retry before we drop the reference. Oops.

v2: The vblank_put must be after the frambuffer_put (Michel). I suck at
unwrapping code that doesn't use separate labels for each stage, but
checks each pointer first ... While re-reading everything I also
realized that we must clean up the fb refcounts, and specifically
plane->old_fb before we drop the locks, either in the final unlocking,
or in the w/w retry path. Hence the correct fix is to drop the
vblank_put to the very bottom.

Fixes: 29dc0d1d ("drm: Roll out acquire context for the page_flip ioctl")
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
Reported-by: NTommi Rantala <tt.rantala@gmail.com>
Cc: Tommi Rantala <tt.rantala@gmail.com>
Cc: Michel Dänzer <michel@daenzer.net>
Tested-by: NTommi Rantala <tt.rantala@gmail.com>
Reviewed-by: NMichel Dänzer <michel.daenzer@amd.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170522135945.28831-1-daniel.vetter@ffwll.ch

qxl_release_map will enter an atomic context, but since we still need to
alloc memory for BOs, we better delay that until we have everything we
need, in case we need to sleep inside the allocation.  This avoids the
Sleep in atomic state below, which was reported by Mike.

 [   43.910362] BUG: sleeping function called from invalid context at mm/slab.h:432
 [   43.910955] in_atomic(): 1, irqs_disabled(): 0, pid: 2077, name: Xorg
 [   43.911472] Preemption disabled at:
 [   43.911478] [<ffffffffa02b1c45>] qxl_bo_kmap_atomic_page+0xa5/0x100 [qxl]
 [   43.912103] CPU: 0 PID: 2077 Comm: Xorg Tainted: G            E   4.12.0-master #38
 [ 43.912550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
 rel-1.8.1-0-g4adadbd-20161202_174313-build11a 04/01/2014
 [   43.913202] Call Trace:
 [   43.913371]  dump_stack+0x65/0x89
 [   43.913581]  ? qxl_bo_kmap_atomic_page+0xa5/0x100 [qxl]
 [   43.913876]  ___might_sleep+0x11a/0x190
 [   43.914095]  __might_sleep+0x4a/0x80
 [   43.914319]  ? qxl_bo_create+0x50/0x190 [qxl]
 [   43.914565]  kmem_cache_alloc_trace+0x46/0x180
 [   43.914836]  qxl_bo_create+0x50/0x190 [qxl]
 [   43.915082]  ? refcount_dec_and_test+0x11/0x20
 [   43.915332]  ? ttm_mem_io_reserve+0x41/0xe0 [ttm]
 [   43.915595]  qxl_alloc_bo_reserved+0x37/0xb0 [qxl]
 [   43.915884]  qxl_cursor_atomic_update+0x8f/0x260 [qxl]
 [   43.916172]  ? drm_atomic_helper_update_legacy_modeset_state+0x1d6/0x210 [drm_kms_helper]
 [   43.916623]  drm_atomic_helper_commit_planes+0xec/0x230 [drm_kms_helper]
 [   43.916995]  drm_atomic_helper_commit_tail+0x2b/0x60 [drm_kms_helper]
 [   43.917398]  commit_tail+0x65/0x70 [drm_kms_helper]
 [   43.917693]  drm_atomic_helper_commit+0xa9/0x100 [drm_kms_helper]
 [   43.918039]  drm_atomic_commit+0x4b/0x50 [drm]
 [   43.918334]  drm_atomic_helper_update_plane+0xf1/0x110 [drm_kms_helper]
 [   43.918902]  __setplane_internal+0x19f/0x280 [drm]
 [   43.919240]  drm_mode_cursor_universal+0x101/0x1c0 [drm]
 [   43.919541]  drm_mode_cursor_common+0x15b/0x1d0 [drm]
 [   43.919858]  drm_mode_cursor2_ioctl+0xe/0x10 [drm]
 [   43.920157]  drm_ioctl+0x211/0x460 [drm]
 [   43.920383]  ? drm_mode_cursor_ioctl+0x50/0x50 [drm]
 [   43.920664]  ? handle_mm_fault+0x93/0x160
 [   43.920893]  do_vfs_ioctl+0x96/0x6e0
 [   43.921117]  ? __fget+0x73/0xa0
 [   43.921322]  SyS_ioctl+0x41/0x70
 [   43.921545]  entry_SYSCALL_64_fastpath+0x1a/0xa5
 [   43.922188] RIP: 0033:0x7f1145804bc7
 [   43.922526] RSP: 002b:00007ffcd3e50508 EFLAGS: 00003246 ORIG_RAX: 0000000000000010
 [   43.923367] RAX: ffffffffffffffda RBX: 0000000000000040 RCX: 00007f1145804bc7
 [   43.923852] RDX: 00007ffcd3e50540 RSI: 00000000c02464bb RDI: 000000000000000b
 [   43.924299] RBP: 0000000000000040 R08: 0000000000000040 R09: 000000000000000c
 [   43.924694] R10: 00007ffcd3e50340 R11: 0000000000003246 R12: 0000000000000018
 [   43.925128] R13: 00000000022bc390 R14: 0000000000000040 R15: 00007ffcd3e5062c
Reported-by: NMike Galbraith <efault@gmx.de>
Signed-off-by: NGabriel Krisman Bertazi <krisman@collabora.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170519175819.15682-1-krisman@collabora.co.ukSigned-off-by: NGerd Hoffmann <kraxel@redhat.com>

Nicolai Stange reports the following oops which is caused by
dereferencing rdev->pdev before it's subsequently set by
radeon_device_init().  Fix it.

  BUG: unable to handle kernel NULL pointer dereference at 00000000000007cb
  IP: radeon_driver_load_kms+0xeb/0x230 [radeon]
  ...
  Call Trace:
   drm_dev_register+0x146/0x1d0 [drm]
   drm_get_pci_dev+0x9a/0x180 [drm]
   radeon_pci_probe+0xb8/0xe0 [radeon]
   local_pci_probe+0x45/0xa0
   pci_device_probe+0x14f/0x1a0
   driver_probe_device+0x29c/0x450
   __driver_attach+0xdf/0xf0
   ? driver_probe_device+0x450/0x450
   bus_for_each_dev+0x6c/0xc0
   driver_attach+0x1e/0x20
   bus_add_driver+0x170/0x270
   driver_register+0x60/0xe0
   ? 0xffffffffc0508000
   __pci_register_driver+0x4c/0x50
   drm_pci_init+0xeb/0x100 [drm]
   ? vga_switcheroo_register_handler+0x6a/0x90
   ? 0xffffffffc0508000
   radeon_init+0x98/0xb6 [radeon]
   do_one_initcall+0x52/0x1a0
   ? __vunmap+0x81/0xb0
   ? kmem_cache_alloc_trace+0x159/0x1b0
   ? do_init_module+0x27/0x1f8
   do_init_module+0x5f/0x1f8
   load_module+0x27ce/0x2be0
   SYSC_finit_module+0xdf/0x110
   ? SYSC_finit_module+0xdf/0x110
   SyS_finit_module+0xe/0x10
   do_syscall_64+0x67/0x150
   entry_SYSCALL64_slow_path+0x25/0x25

Fixes: 7ffb0ce3 ("drm/radeon: Don't register Thunderbolt eGPU with vga_switcheroo")
Reported-and-tested-by: NNicolai Stange <nicstange@gmail.com>
Signed-off-by: NLukas Wunner <lukas@wunner.de>
Link: http://patchwork.freedesktop.org/patch/msgid/cfb91ba052af06117137eec0637543a2626a7979.1495135190.git.lukas@wunner.de

drm_of_find_panel_or_bridge() is expecting np to point to the encoder
node, not the bridge or panel this encoder is feeding.
Moreover, the endpoint parameter passed to drm_of_find_panel_or_bridge()
is always set to zero, which prevents us from probing all outputs.

We also move the atmel_hlcdc_rgb_output allocation after the
panel/bridge detection to avoid useless allocations.
Reported-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Fixes: ebc94461 ("drm: convert drivers to use drm_of_find_panel_or_bridge")
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1495110921-4032-1-git-send-email-boris.brezillon@free-electrons.com

When IOMMU_IOVA is not built-in but host1x is, we get a link error:

drivers/gpu/host1x/dev.o: In function `host1x_remove':
dev.c:(.text.host1x_remove+0x50): undefined reference to `put_iova_domain'
drivers/gpu/host1x/dev.o: In function `host1x_probe':
dev.c:(.text.host1x_probe+0x31c): undefined reference to `init_iova_domain'
dev.c:(.text.host1x_probe+0x38c): undefined reference to `put_iova_domain'
drivers/gpu/host1x/cdma.o: In function `host1x_cdma_init':
cdma.c:(.text.host1x_cdma_init+0x238): undefined reference to `alloc_iova'
cdma.c:(.text.host1x_cdma_init+0x2c0): undefined reference to `__free_iova'
drivers/gpu/host1x/cdma.o: In function `host1x_cdma_deinit':
cdma.c:(.text.host1x_cdma_deinit+0xb0): undefined reference to `free_iova'

This adds the same select statement that we have for drm_tegra.

Fixes: 404bfb78 ("gpu: host1x: Add IOMMU support")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Reviewed-by: NMikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170419182449.885312-1-arnd@arndb.de

Presumably we can never actually hit this return, but static checkers
complain that we should unlock before we return.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

The last goto looks spurious because it releases less resources than the
previous one.
Also free 'img->sig' if 'ls_ucode_img_build()' fails.

Fixes: 9d896f3e ("drm/nouveau/secboot: abstract LS firmware loading functions")
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Commit cae9ff03 effectively disabled the drm poll_helper by checking
the wrong flag to see if the driver should enable the poll or not:
mode_config.poll_enabled is only set to true by poll_init and it is not
indicating if the poll is enabled or not.
nouveau_display_create() will initialize the poll and going to disable it
right away. After poll_init() the mode_config.poll_enabled will be true,
but the poll itself is disabled.

To avoid the race caused by calling the poll_enable() from different paths,
this patch will enable the poll from one place, in the
nouveau_display_hpd_work().

In case the pm_runtime is disabled we will enable the poll in
nouveau_drm_load() once.

Fixes: cae9ff03 ("drm/nouveau: Don't enabling polling twice on runtime resume")
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: NLyude <lyude@redhat.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

If a vma is already bound to a ppgtt, we incorrectly call
allocate_va_range again when doing a PIN_UPDATE, which will result in
over accounting within our paging structures, such that when we do
unbind something we don't actually destroy the structures and end up
inadvertently recycling them. In reality this probably isn't too bad,
but once we start touching PDEs and PDPEs for 64K/2M/1G pages this
apparent recycling will manifest into lots of really, really subtle
bugs.

v2: Fix the testing of vma->flags for aliasing_ppgtt_bind_vma

Fixes: ff685975 ("drm/i915: Move allocate_va_range to GTT")
Signed-off-by: NMatthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170512091423.26085-1-chris@chris-wilson.co.uk
(cherry picked from commit 1f23475c)
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

Turns out our skills in decoding the CLKCFG register weren't good
enough. On this particular elk the answer we got was 400 MHz when
in reality the clock was running at 266 MHz, which then caused us
to program a bogus AUX clock divider that caused all AUX communication
to fail.

Sadly the docs are now in bit heaven, so the fix will have to be based
on empirical evidence. Using another elk machine I was able to frob
the FSB frequency from the BIOS and see how it affects the CLKCFG
register. The machine seesm to use a frequency of 266 MHz by default,
and fortunately it still boot even with the 50% CPU overclock that
we get when we bump the FSB up to 400 MHz.

It turns out the actual FSB frequency and the register have no real
link whatsoever. The register value is based on some straps or something,
but fortunately those too can be configured from the BIOS on this board,
although it doesn't seem to respect the settings 100%. In the end I was
able to derive the following relationship:

BIOS FSB / strap | CLKCFG
-------------------------
200              | 0x2
266              | 0x0
333              | 0x4
400              | 0x4

So only the 200 and 400 MHz cases actually match how we're currently
decoding that register. But as the comment next to some of the defines
says, we have been just guessing anyway.

So let's fix things up so that at least the 266 MHz case will work
correctly as that is actually the setting used by both the buggy
machine and my test machine.

The fact that 333 and 400 MHz BIOS settings result in the same register
value is a little disappointing, as that means we can't tell them apart.
However, according to the gmch datasheet for both elk and ctg 400 Mhz is
not even a supported FSB frequency, so I'm going to make the assumption
that we should decode it as 333 MHz instead.

Cc: stable@vger.kernel.org
Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
Reported-by: NTomi Sarvela <tomi.p.sarvela@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100926Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170504181530.6908-1-ville.syrjala@linux.intel.comAcked-by: NJani Nikula <jani.nikula@intel.com>
Tested-by: NTomi Sarvela <tomi.p.sarvela@intel.com>
(cherry picked from commit 6f38123e)
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

Not calling pm_runtime_enable() means that runtime PM can't be
enabled at all via sysfs. So we definitely need to call it
from somewhere.

Calling it from the driver seems like a bad idea because it
would have to be paired with a pm_runtime_disable() at driver
unload time, otherwise the core gets upset. Also if there's
no LPE audio driver loaded then we couldn't runtime suspend
i915 either.

So it looks like a better plan is to call it from i915 when
we register the platform device. That seems to match how
pci generally does things. I cargo culted the
pm_runtime_forbid() and pm_runtime_set_active() calls from
pci as well.

The exposed runtime PM API is massive an thorougly misleading, so
I don't actually know if this is how you're supposed to use the API
or not. But it seems to work. I can now runtime suspend i915 again
with or without the LPE audio driver loaded, and reloading the
LPE audio driver also seems to work.

Note that powertop won't auto-tune runtime PM for platform devices,
which is a little annoying. So I'm not sure that leaving runtime
PM in "on" mode by default is the best choice here. But I've left
it like that for now at least.

Also remove the comment about there not being much benefit from
LPE audio runtime PM. Not allowing runtime PM blocks i915 runtime
PM, which will also block s0ix, and that could have a measurable
impact on power consumption.

Cc: stable@vger.kernel.org
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Fixes: 0b6b524f ("ALSA: x86: Don't enable runtime PM as default")
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170427160231.13337-2-ville.syrjala@linux.intel.comReviewed-by: NTakashi Iwai <tiwai@suse.de>
(cherry picked from commit 183c0035)
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

The sequence in glk_dsi_device_ready() enters ULPS then waits until it is
*not* active to then disable it. The correct sequence according to the
spec is to enter ULPS then wait until the GLK_ULPS_NOT_ACTIVE bit is
zero, i.e., ULPS is active, and then disable ULPS.

Fixing the condition gets rid of the following spurious error messages:

[drm:glk_dsi_device_ready [i915]] *ERROR* ULPS is still active

Fixes: 46448483 ("drm/i915/glk: Add MIPIIO Enable/disable sequence")
Cc: Deepak M <m.deepak@intel.com>
Cc: Madhav Chauhan <madhav.chauhan@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <drm-intel-fixes@lists.freedesktop.org>
Signed-off-by: NAnder Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: NMadhav Chauhan <madhav.chauhan@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170428080222.6147-1-ander.conselvan.de.oliveira@intel.com
(cherry picked from commit 3acbec03)
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

Add a new Kconfig option to enable/disable the extra warnings
from the vblank evade code. For now we'll keep the warning
about an actually missed vblank always enabled as that can have
an actual user visible impact. But if we miss the deadline
othrwise there's no real need to bother the user with that.
We'll want these warnings enabled during development however
so that we can catch regressions.

Based on the reports it looks like this is still very easy
to hit on SKL, so we have more work ahead of us to optimize
the crtiical section further.

Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reported-by: NJens Axboe <axboe@kernel.dk>
Reported-by: NLinus Torvalds <torvalds@linux-foundation.org>
Fixes: e1edbd44 ("drm/i915: Complain if we take too long under vblank evasion.")
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NDave Airlie <airlied@redhat.com>

These were ineffective due to touching the list without the alarm lock,
but should no longer be required.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org

The idea here was to avoid having to "manually" program the HW if there's
a new earliest alarm.  This was lazy and bad, as it leads to loads of fun
races between inter-related callers (ie. therm).

Turns out, it's not so difficult after all.  Go figure ;)
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org

At least therm/fantog "attempts" to work around this issue, which could
lead to corruption of the pending alarm list.

Fix it properly by not updating the timestamp without the lock held, or
trying to add an already pending alarm to the pending alarm list....
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org

If the time to the next alarm is short enough, we could race with HW and
end up with an ~4 second delay until it triggers.

Fix this by checking again after we update HW.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org

Fixes a race where we can miss an alarm that triggers while we're already
processing previous alarms.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org

object->engine cannot be NULL, it's either valid, or an error pointer.

This particular condition shouldn't actually be possible, but just in
case, we'll keep it.
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

This reg has moved on Pascal, and causes a bus fault.

We never use the value anyway, so just remove the read.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

The DRM core used to only call prepare_fb/cleanup_fb() when a plane's
framebuffer changed, which achieved the desired effect.

It's apparently now up to the driver to decide on its own.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org [4.11+]